<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        * {
            padding: 0px;
            margin: 0px;
        }

        .content {
            width: 100%;
            height: 40px;
            background-color: red;
        }

        .menu {
            width: 1200px;
            height: 40px;
            background-color: green;
            margin: 0px auto;
        }

        .box {
            width: 95%;
            height: 450px;
            background-color: yellow;
            margin: 0px auto;
        }



        .box_left {
            width: 550px;
            height: 450px;
            background-color: pink;
            float: left;
        }

        .box_right {
            width: 1060px;
            height: auto;
            background-color: aquamarine;
            float: right;
            margin-bottom: 5px;
        }

        .box_kuai {
            width: 250px;
            height: 200px;
            background-color: black;
            float: left;
            margin-left: 5px;
            margin-right: 5px;
            margin-top: 15px;
        }
    </style>
</head>

<div class="content">
    <div class="menu"></div>
</div>
<!-- 内容块 -->
<div class="box">
    <!-- left -->
    <div class="box_left"></div>
    <!-- right -->
    <div class="box_right">
        <!-- 块 -->
        <div class="box_kuai"></div>
        <div class="box_kuai"></div>
        <div class="box_kuai"></div>
        <div class="box_kuai"></div>
        <div class="box_kuai"></div>
        <div class="box_kuai"></div>
        <div class="box_kuai"></div>
        <div class="box_kuai"></div>
        <div class="box_kuai"></div>
        <div class="box_kuai"></div>
        <div class="box_kuai"></div>
        <div class="box_kuai"></div>
    </div>
</div>




<body>

</body>

</html>